diff --git a/lib/excellib.class.php b/lib/excellib.class.php
index ff382526cd8..ef612b4bde9 100644
--- a/lib/excellib.class.php
+++ b/lib/excellib.class.php
@@ -116,7 +116,7 @@ class MoodleExcelWorkbook {
             header('Pragma: no-cache');
         }
 
-        if (core_useragent::is_ie()) {
+        if (core_useragent::is_ie() || core_useragent::is_edge()) {
             $filename = rawurlencode($filename);
         } else {
             $filename = s($filename);
diff --git a/lib/filelib.php b/lib/filelib.php
index 53f07db0c90..a8c844a2b1c 100644
--- a/lib/filelib.php
+++ b/lib/filelib.php
@@ -2115,7 +2115,7 @@ function send_temp_file($path, $filename, $pathisstring=false) {
     }
 
     // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
-    if (core_useragent::is_ie()) {
+    if (core_useragent::is_ie() || core_useragent::is_edge()) {
         $filename = urlencode($filename);
     }
 
@@ -2264,7 +2264,7 @@ function send_file($path, $filename, $lifetime = null , $filter=0, $pathisstring
     }
 
     // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
-    if (core_useragent::is_ie()) {
+    if (core_useragent::is_ie() || core_useragent::is_edge()) {
         $filename = rawurlencode($filename);
     }